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US6293991B1 - Process for producing liquid pig iron comprising recirculating agglomerated sludges - Google Patents

Process for producing liquid pig iron comprising recirculating agglomerated sludges Download PDF

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Publication number
US6293991B1
US6293991B1 US09/402,337 US40233799A US6293991B1 US 6293991 B1 US6293991 B1 US 6293991B1 US 40233799 A US40233799 A US 40233799A US 6293991 B1 US6293991 B1 US 6293991B1
Authority
US
United States
Prior art keywords
sludges
zone
reduction zone
melt
reduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/402,337
Other languages
English (en)
Inventor
Herbert Gruenbacher
Guenter Schrey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Voest Alpine Industrieanlagenbau GmbH
Original Assignee
Deutsche Voest Alpine Industrieanlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Voest Alpine Industrieanlagenbau GmbH filed Critical Deutsche Voest Alpine Industrieanlagenbau GmbH
Assigned to DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH, A CORP. OF GERMANY reassignment DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH, A CORP. OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHREY, GUENTER, GRUENBACHER, HERBERT
Application granted granted Critical
Publication of US6293991B1 publication Critical patent/US6293991B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
    • C21B13/002—Reduction of iron ores by passing through a heated column of carbon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/22—Increasing the gas reduction potential of recycled exhaust gases by reforming
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/28—Increasing the gas reduction potential of recycled exhaust gases by separation
    • C21B2100/282—Increasing the gas reduction potential of recycled exhaust gases by separation of carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
    • C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/961—Treating flue dust to obtain metal other than by consolidation

Definitions

  • the purified topgas from the reduction zone is subjected to CO 2 elimination, after scrubbing, and as an at least largely CO 2 -free reducing gas is conducted to at least one further reduction zone serving for the direct reduction of metal ore, particularly of iron ore or pellets, after reacting with the metal ore in the further reduction zone ( 32 ) is withdrawn as an export gas and purified in a scrubber and the sludges obtained in the scrubbing of the export gas from the further reduction zone are at least partially agglomerated and the agglomerate thus formed is recirculated into the first reduction zone.
  • the sludges that develop during the scrubbing of the export gas of the further reduction zone can also be re-utilized in an efficient manner.
  • the sludge discharge duct associated with the second scrubber is flow connected with the sludge discharge duct associated with the first scrubber.
  • a further reduction reactor for receiving metal ore, in particular further iron ore or pellets, which reactor comprises a reducing-gas feed duct, an export-gas discharge duct equipped with a third scrubber, and a discharging device for the reduction product formed in this reduction reactor, wherein the topgas discharge duct of the first reduction reactor runs into a CO 2 elimination plant from which the reducing-gas feed duct of the further reduction reactor departs and runs into the further reduction reactor, and wherein a sludge discharge duct from the third scrubber leads to a means for agglomerating at least a portion of the sludges arising in the third scrubber, which means is flow-connected with the first reduction reactor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
US09/402,337 1997-04-16 1998-04-09 Process for producing liquid pig iron comprising recirculating agglomerated sludges Expired - Fee Related US6293991B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA659/97 1997-04-16
AT97659A AT404598B (de) 1997-04-16 1997-04-16 Verfahren und anlage zur herstellung von fluessigem roheisen oder fluessigen stahlvorprodukten
PCT/EP1998/002086 WO1998046800A1 (fr) 1997-04-16 1998-04-09 Procede de production de fonte brute ou de preparations metallurgiques liquides

Publications (1)

Publication Number Publication Date
US6293991B1 true US6293991B1 (en) 2001-09-25

Family

ID=3496442

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/402,337 Expired - Fee Related US6293991B1 (en) 1997-04-16 1998-04-09 Process for producing liquid pig iron comprising recirculating agglomerated sludges

Country Status (14)

Country Link
US (1) US6293991B1 (fr)
EP (1) EP0975813B1 (fr)
JP (1) JP2001521580A (fr)
KR (1) KR20010006490A (fr)
CN (1) CN1075116C (fr)
AT (1) AT404598B (fr)
AU (1) AU732983B2 (fr)
BR (1) BR9808903A (fr)
CA (1) CA2288654A1 (fr)
DE (1) DE59801784D1 (fr)
PL (1) PL336417A1 (fr)
TW (1) TW393514B (fr)
WO (1) WO1998046800A1 (fr)
ZA (1) ZA983154B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101321930B1 (ko) * 2012-06-07 2013-10-28 주식회사 포스코 환원철 제조장치 및 이를 이용한 환원철 제조방법
EP3239306A1 (fr) * 2016-04-27 2017-11-01 Primetals Technologies Austria GmbH Procédé et appareil de fabrication de produits de fonte brute liquide

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012363A1 (fr) 1978-12-07 1980-06-25 Krupp Polysius Ag Procédé et dispositif pour la réduction de minerais
AT376241B (de) 1983-01-03 1984-10-25 Voest Alpine Ag Verfahren zum schmelzen von zumindest teilweise reduziertem eisenerz
DE4123626A1 (de) 1991-07-17 1993-01-21 Intercept Ag Verfahren zur metallurgischen aufarbeitung von huettenreststoffen
EP0623684A2 (fr) 1993-05-07 1994-11-09 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Procédé pour la récupération de déchets ou de résidus ferreux
AT400725B (de) 1994-04-11 1996-03-25 Voest Alpine Ind Anlagen Verfahren zum herstellen einer eisenschmelze
US5531805A (en) * 1990-02-13 1996-07-02 The Illawarra Technology Corporation Limited Smelting ferrous materials
WO1996034120A1 (fr) 1995-04-24 1996-10-31 Voest-Alpine Industrieanlagenbau Gmbh Procede et installation de recyclage de residus ferreux de l'industrie metallurgique

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012363A1 (fr) 1978-12-07 1980-06-25 Krupp Polysius Ag Procédé et dispositif pour la réduction de minerais
AT376241B (de) 1983-01-03 1984-10-25 Voest Alpine Ag Verfahren zum schmelzen von zumindest teilweise reduziertem eisenerz
US5531805A (en) * 1990-02-13 1996-07-02 The Illawarra Technology Corporation Limited Smelting ferrous materials
DE4123626A1 (de) 1991-07-17 1993-01-21 Intercept Ag Verfahren zur metallurgischen aufarbeitung von huettenreststoffen
EP0623684A2 (fr) 1993-05-07 1994-11-09 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Procédé pour la récupération de déchets ou de résidus ferreux
AT400725B (de) 1994-04-11 1996-03-25 Voest Alpine Ind Anlagen Verfahren zum herstellen einer eisenschmelze
US5514203A (en) 1994-04-11 1996-05-07 Deutsche Voest Alpine Industrieanlagenbau Gmbh Process for producing an iron melt
WO1996034120A1 (fr) 1995-04-24 1996-10-31 Voest-Alpine Industrieanlagenbau Gmbh Procede et installation de recyclage de residus ferreux de l'industrie metallurgique

Also Published As

Publication number Publication date
PL336417A1 (en) 2000-06-19
AU7523598A (en) 1998-11-11
EP0975813A1 (fr) 2000-02-02
TW393514B (en) 2000-06-11
KR20010006490A (ko) 2001-01-26
ZA983154B (en) 1998-10-22
CN1075116C (zh) 2001-11-21
EP0975813B1 (fr) 2001-10-17
CN1252841A (zh) 2000-05-10
AT404598B (de) 1998-12-28
AU732983B2 (en) 2001-05-03
BR9808903A (pt) 2000-08-01
JP2001521580A (ja) 2001-11-06
WO1998046800A1 (fr) 1998-10-22
ATA65997A (de) 1998-05-15
CA2288654A1 (fr) 1998-10-22
DE59801784D1 (de) 2001-11-22

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Owner name: DEUTSCHE VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH, A

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GRUENBACHER, HERBERT;SCHREY, GUENTER;REEL/FRAME:010412/0108;SIGNING DATES FROM 19990913 TO 19990915

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STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

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Effective date: 20050925